Installer's handbook - 1/3 Types of installation - 2/3 Software guide ...

Pink/Black wires.
Pay Attention to the fact
the Spark timing function
is not available for 8 cylinder
vehicles ECUS.
In case you use this type of
connection, cut and insulate the
“L” grey wire indicated in the
electrical plans on the “Types of
Installation 2/3” Guide.
6.2.18.C Engine Water
Temperature Signal
This signal is sometimes useful
to compensate the cold enrichment
programmed by the carmaker that
can be counterproductive in the gas
operation. This kind of connection is
normally for CNG applications.
For its correct use it is recommended
to refer to the BRC indications.
The signal is taken on the
wire of the engine water sensor of
the original equipment of the vehicle.
This wire should not be cut, but
only stripped and soldered with the
White/Red wire of the SEQUENT
Harness for Auxiliary connections
(picture 12).
6.2.18.D Lambda
Oxygen Sensor Signal
In the SEQUENT system the
Lambda oxygen sensor signal is
not normally taken and emulated.
The possible connection of the
Yellow wire going out from the main
harness allows a quicker vehicle
self-learning. In case of emulation
of the Lambda oxygen sensor
signal, it is necessary to cut the
wire going from the ECU to the
Lambda oxygen sensor, connect
the Light blue “1” wire of the
Auxiliary Harness from the ECU
side to the Yellow “1” wire of the
Lambda oxygen sensor side (picture
13).
These connections should be
realised only on particular vehicles,
on the BRC after-sales service’s
advice.
Petrol
ECU
10-pole-harness
connector
for auxiliary
connections
Oxygen sensor signal
Yellow 1
Light blue 1
In case of two-bank vehicles,
Sequent offers the possibility to act
on the second Lambda oxygen
sensor, through the Yellow “2” and
Light blue “2” wires present on the
Auxiliary Harness.
These last connections too
should be only realised on particular
vehicles, on the BRC aftersales
service’s advice.
6.3 SEQUENT FASTNESS
MAIN HARNESS (REFER TO
GENERAL WIRING PLAN IN
PICTURE 15)
"N1"
In the following paragraphs only
the differences compared to the
previously described Sequent
Harness (see § 6.2) will be described
to avoid useless repetitions.
As you may note in the two
general wiring plans in picture 2
page 38 and picture 15 page 46
there are some important differences.
45
N1
✂
Yellow 2
Light blue 1
Light blue 2
N2
"Q"
✂
"N2"
Yellow 1
"N"
Oxygen sensor signal
Petrol
ECU
FLY SF
FLY SF
Picture 13
Picture 14
In the Sequent Fastness one
(picture 15) the 10-pole connector
for the auxiliary connection has
been eliminated while a 5-pole
ones for the crankshaft sensor and
for the spark timing managing
and/or rpm reading has been
added.
The black wire (gas temperature
2) and the White/Red one (water
temperature) have been eliminated
and the last one is incorporated on
the Zenith reducer.
6.3.1 ZENITH SEQUENT
FASTNESS AND WATER
TEMPERATURE SENSOR
The connection to the harness
is made with the suitable 4-pole
connector (male holder on the harness)
where the 3 wires contained
in the harness “G” sheath end.
In the final part about 10 cm
of yellow thermo-narrowing is
introduced to avoid confusion